My PRS-T1 is still connected to my computer and I don't know what to do. I am afraid that it might be bricked. Also, when I wrote the partition table, fdisk issued a warning "device is busy, the kernel will use the old partition table", is that normal ?

Please, please help. I am not a hacker but I can use the command line, so I figured I could try this procedure. Thanks.

I forgot to mention. Between stage 11 and 12, something went possibly wrong. Only the terminal rebooted and ask me for login, the PRS-T1 did nothing. So I disconnected it, pressed the reset button, pressed home and menu together and reconnected it to my computer.